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Home/ Questions/Q 8243919
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Editorial Team
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Editorial Team
Asked: June 7, 20262026-06-07T21:40:32+00:00 2026-06-07T21:40:32+00:00

I have a PHP script that compiles LaTeX documents with the use of: exec(‘cd

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I have a PHP script that compiles LaTeX documents with the use of:

exec('cd /path/to/doc && /usr/bin/latexmk -pdf filename.tex');

This is working for some of my LaTeX documents but my latest document doesn’t compile and a look at the log reveals:

!pdfTeX error: pdflatex (file ecrm1000): Font ecrm1000 at 600 not found
==> Fatal error occurred, no output PDF file produced!

Which I have found is the result of LaTeX not being able to see the required font packages. When I run the same compile command under my username the document compiles as it should. So my question is, how can I get PHP (executing as www-data) to get access to the necessary LaTeX packages?

I have tried installing the required package under the www-data account using:

sudo -u www-data sudo apt-get install texlive-fonts-recommended

but it askes for www-data’s password, which I don’t believe was set by me and isn’t anything I’ve thrown at it.

I’m running Ubuntu 12.04 if it’s any help.

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  1. Editorial Team
    Editorial Team
    2026-06-07T21:40:33+00:00Added an answer on June 7, 2026 at 9:40 pm

    sudo mktexpk --destdir /usr/share/texmf-texlive/fonts/pk/ljfour/jknappen/ec/ --mfmode / --bdpi 600 --mag 1+0/600 --dpi 600 ecrm1000

    … makes the font available for all users (same as in missingfont.log but with –destdir argument).

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